CHAPTER 4 PORT FUNCTIONS
User’s Manual U16896EJ2V0UD
83
(4) Port 3 function register H (PF3H)
0
When used as normal port (N-ch open-drain output)
When used as alternate-function (N-ch open-drain output)
PF3n
0
1
Specification of normal port/alternate function (n = 8, 9)
PF3H
0
0
0
0
0
PF39
PF38
After reset: 00H R/W Address: FFFFFC67H
Caution
When using P38 and P39 as N-ch open-drain-output alternate-function pins, set in
the following sequence.
Be sure to set the port latch to 1 before setting the pin to N-ch open-drain output.
P3n bit = 1
→
PF3n bit
= 1
→
PMC3n bit = 1
(5) Port 3 function control register (PFC3)
PFC3
After reset: 00H R/W Address: FFFFF466H
0
0
PFC35
PFC34
PFC33
PFC32
0
0
Remark
For details of specification of alternate-function pins, refer to
4.3.2 (7) Specifying
alternate-function pins of port 3
.
(6) Port 3 function control expansion register (PFCE3)
PFCE3
After reset: 00H R/W Address: FFFFF706H
0
0
0
PFCE34
PFCE33
0
0
0
Remark
For details of specification of alternate-function pins, refer to
4.3.2 (7) Specifying
alternate-function pins of port 3
.
